{
\def\sym#1{\ifmmode^{#1}\else\(^{#1}\)\fi}
\begin{tabular}{l*{4}{c}}
\toprule
                    &\multicolumn{2}{c}{Workers}    &\multicolumn{2}{c}{Worker-Days}\\\cmidrule(lr){2-3}\cmidrule(lr){4-5}
                    &\multicolumn{1}{c}{(1)}&\multicolumn{1}{c}{(2)}&\multicolumn{1}{c}{(3)}&\multicolumn{1}{c}{(4)}\\
                    &\multicolumn{1}{c}{Log Contract}&\multicolumn{1}{c}{Frac. Contract}&\multicolumn{1}{c}{Log Contract}&\multicolumn{1}{c}{Frac. Contract}\\
\midrule \multicolumn{4}{l}{\textit{\textbf{Panel A: Impact on Usage of Contract Workers}}} \\ \midrule
Post X Treat        &      -0.114** &      -0.017***&      -0.128** &      -0.017***\\
                    &     (0.054)   &     (0.004)   &     (0.055)   &     (0.004)   \\
\midrule
R2                  &       0.747   &       0.755   &       0.747   &       0.755   \\
N                   &      191956   &      191956   &      191956   &      191956   \\


                    &\multicolumn{1}{c}{Log Regular}&\multicolumn{1}{c}{Log Total}&\multicolumn{1}{c}{Log Regular}&\multicolumn{1}{c}{Log Total}\\
\midrule \multicolumn{3}{l}{\textit{\textbf{Panel B: Impact on Payroll Workers and Firm Size}}} \\ \midrule
Post X Treat        &       0.126***&       0.016   &       0.113***&       0.004   \\
                    &     (0.039)   &     (0.018)   &     (0.038)   &     (0.019)   \\
\midrule
R2                  &       0.831   &       0.945   &       0.837   &       0.942   \\
N                   &      191956   &      191956   &      191956   &      191956   \\
\bottomrule
\end{tabular}
}
